Your AI CFO.
From day one.
Finn runs your books, files your taxes, and guides your next move — 24/7, for £9/month.
No credit card required · Free during Early Access
AccountsOS
Online
Can I claim a client dinner as an expense?
Yes, but only for Corporation Tax - not VAT.
• Business entertainment = CT deductible
• But you can't reclaim the VAT
• Keep the receipt + note who attended
What if it's just me working late?
Solo meals aren't usually allowable. But if you're away from your normal workplace overnight, subsistence is claimable.
Tip: Forward receipts to me, I'll categorise them
Your AI CFO
Meet Finn.
Most founders can't afford a CFO. Finn gives you everything one would — your books kept, your taxes filed, your risks flagged, and your next move guided. He remembers every conversation, every decision, and every transaction.
“You could save £2,400 this year by claiming your home office through the business.”
“At current burn you have 14 weeks of runway. Two invoices over 60 days are the main risk.”
“You're 23% behind your Q2 revenue target. Here's what needs to happen this month.”
Remembers everything. Learns your patterns. Gets smarter over time.
Up and running in minutes
Three steps. No migration headaches.
Sign up
Create your account and connect your company via Companies House. Takes 2 minutes.
Connect your books
Upload bank statements, forward receipts, or import from your existing tool. We handle the rest.
Finn takes it from here
Your AI CFO categorises transactions, tracks deadlines, files taxes, and tells you what to do next.
Everything a UK Ltd company needs
No add-ons. No hidden fees. No accountant required.
Bookkeeping
Auto-categorised transactions, bank reconciliation, and a double-entry ledger that keeps itself up to date.
Tax & Compliance
Corporation Tax calculator, VAT MTD submission, annual accounts wizard, and deadline tracking.
Invoicing
Create, send, and track professional invoices. Recurring billing and payment reminders built in.
Reports
Profit & Loss, Balance Sheet, VAT summary, and trial balance. Export to PDF or CSV anytime.
Payroll
Director salary, dividends, and DLA tracking with S455 warnings. Voucher generation included.
Integrations
WhatsApp, Slack, Email, Claude Desktop (MCP), ChatGPT. Bank statement import for all UK banks.
A CFO for £9/month.
The average UK founder spends £155-405/month cobbling this together. Finn replaces all of it.
| What you're replacing | Typical cost |
|---|---|
| Accountant | £100-300/month |
| Bookkeeping software | £20-35/month |
| Receipt scanning | £15-30/month |
| Payroll software | £10-20/month |
| Invoicing tool | £10-20/month |
| Traditional total | £155-405/month |
| AccountsOS | Free* |
*Free during Early Access — then just £9/month
Sign up now to lock in £9/month forever when paid plans launch (standard price £19/month)
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Start with Finn today.
Your AI CFO is ready. Free during Early Access — no credit card, no commitment.
No credit card required · Free during Early Access